I explored for editing existing fillable Pdf library supported by angular but didn't get any promising solution.Also I shared my findings with Narendra but we couldn't conclude on any feasible solution.

The third party library which we explored are - 

• pdftron
• HummusJs
• pdfAssembler
• https://medium.com/factory-mind/angular-pdf-forms-fa72b15c3fbd

Explored more on editing existing fillable pdf in angular but couldn't found any
Then implemented editing pdf using angular reactive forms as described in factory-mind blog (the one shared yesterday)
Discussions with Narendra and helped him in populating the dropdown control with values, also had zoom call with him regarding dropdown
Facing some alignment issue as I integrated this in an existing preview screen page
Did testing as getting correct data in json

Worked on alignment of controls in edit mode of pdf
Faced issue in aligning controls - with Smita help manage to fix UI issue to some extent but not perfect view
When pdf has more than 1 page then controls are generated twice and are overlapping, checked with Narendra too regarding this but didn't get update from him

Worked on alignment of controls on page navigation - done
Worked on alignment of controls on page resize - inprogress

Did testing of controls alignment with pdf having 3 pages
Worked on persisting values of control on resize and page change, only radio buttons not working correctly
Worked with Ramya for esigned control on pdf

Did unit testing and Merge code in develop branch
Explored for radio button issue (Tried different approach but  issue not fixed)

Explored on radio control issue also tried implementing other approaches but its not yet fixed

Worked on radio control issue -fixed 
Did unit testing
Committed code on develop branch
Worked with Smita for UI changes on editable pdf